Shuttle.



L. E TUPHAM.

SHUTTLE.

APPLICATION FILED MAY 20, 1912. 1,1 31,095. Patented Mar. 9, 1915.

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I l a 6 7 L. E. TOPHAM.

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APPLICATION FILED MAY 20,1912. 1331 995, Patented Mar.9,1915.

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1 l It 75 ilzoento'n. 4/ 447 i ilhfi M emer LAURENCE E. TOPHAM, O1? SWAIYIPSCOTT, MASSACHUSETTS, ASSIGNOB TO UNITED SHOE MACHINERY COMPANY, OF PATTERSON, NEW JERSEY, A CORPOBATIOX OF NEW messy. r

To all whom it'mag concern:

Be it known that I, Lionel-zen E. TornAM, a citizen of the United States, residing at Swampscott, in the county of Essex and State of Massa,chusetts, have invented certain new and useful Improvements in Shuttles; and I do herebydeclere the following to be a. full, clear,-end exact description of the invention; such as will enable others skilled in the artto which it app'erteins to make and use the same. i

The present invention relates to shuttles;

and more particularly to the thread tension,

section, of the shuttle, theloop-teher and its ectuating'mechauism; Figs. 2 and 3 are scctional view-steken ,on the line 2--2 of Fig. l, and illustrate the shuttle detent in different positions; Fig. 4. is a plan View of the shuttle; Rig. 5 is a plan view of the shuttle taken-partly in section; and Fig. 6 is a sectional, View of the shuttle taken on the line 6--6 of Fig. 4.

Referring to the drawings, the loop of thread drawn out bythe needle is ce st around the" shuttle by means of arotary loop-taker indicated generally by reference numeral 2. The loop-taker comprises an annular body pbrtion 4 and an inwardl directed thread engaging beak 6 which is arranged to take the thread from the needle. The annular bod", portion 4 has at its lower end an inwardly projecting flange 8 which is engaged in. an annular raceway formed between the body of the loop-taker support 10 and a plate 12 secured to the top of the support. The loop-taker makes three revolutions to each reciprocation of the needle andis continuously rotated in timed rela I tion therewith by means of a 'Vbevel gear 14 which meshes with bevel gear teeth 16 cut in the periphery of the annular loop -taker body. The nee 1e (notshown) is arranged Specification of Letters Patent.

SHUTTLE.

Patented Mar. 9, 1915.

. Application filed May 20, 1912. Serial No. ceases.

to pass upward thron h'th'e'loo -taker and draws down the three loop whic is entered by the beak '6. The loop-takerlsupportulo is arranged to be oscillated about aivot 18 by means of a link 20, so that hes 6 will clear the needle during its idle revolutions. I

The above described parts are substantially the same, and operate in a manner similar to the corresponding parts illustrated and. de-

scribed in my (o-pendingN application for sewing machines," Serial April 15,1911.

The shuttle, indicated ienerally by reference numeral 34, is rotate l}; mountediwitho. {521,286, filed in the annular loop-taker by means of an inwardly extending annulerj flange 3O lying in a plane at right angles to the axis of rotation of the loop-taker and received in a.

race wey 32 cut around the periphery of the shuttle. The shuttlecomprises a discoidal one piece shuttle body 36. On the lower face of the shuttle body is a projection 38 in which is out a slot 40. The sides of the slot 40 are plane and parallel and the bottom is cut on an arc of a circle. A detent is 1 provided for holding the shuttle stationaryas the loop-taker rotates. The detent comprises a plate 42 which. is a substantially quad-rental sector. The edge of the plate 42 has the same radius of curvature as the bottom of the slot 40. A notch 44, which is somewhat deeper than the slot 40 is cut in I the middle of the curved slot-engaging edge of the plate 42 for a purpose hereinafter pointed out. The plate 4-2 is formed integrnl with a rock shaft 46 which is. journaled in a bushed bearing 48 in the loop-taker support 10. The inner edge of the rock shaft 46 base laterally extending arm 50 which bears a 'pin 52. The pin 52 is re ceived in a cam path 54 in the gear wheel 14. The com patlrfil is so timed that the dctcnt plate 42 is oscillated back .md forth between the two positions shown in'Figs. land 3 re spectively, in timed relation to the'rotary loop-taker. The loop-taker 2 rotates from left to right as viewed in Figs. 1, 2 and 3.

The beak 6 of the loop'take r engages the thread when the loop-take!" is passing through the position illustrated in- Fig. ,1.

:At this time the detent plate 42 is in the position shown in Fig.,3. The beak 6 travels first from the left to the right in front of the shuttle, and then from right toleft behind the shuttle, as viewed 1n Fig. 3, and spreads the loop of needle thread over the shuttle. The top up er legof the loop is free to pass over the uno str'ucted u per face of the shuttle and the lower leg 0 the loop is drawn into the notch 44 which occupies the position shown in Fig. 3. As the beak 6 continues to travel aroundbehind the shuttle, as viewed in- Fi s. 2 and 3, the pin travels into a part of t e cam path 54 nearer the axis of the-wheel 14 and rocks the 'detent late 42 to the left from the position shown in Fig. 3 to the position shown in Fig. 2.

By the time the detent plate 42 has reached the position shown in Fig. 2 and the notch 44 has released the thread, the beak 6 will have traveled completely around the shuttle so that the loop of needle thread can be pulled free from the shuttle and against the work by the take-up of the sewing machine. It will be noted that the detent plate 42 is always in en agement with the slot 40, so that the s uttle is always held against rotation with the looptaker. The detent is positively oscillated, so that after the lower leg of the thread loop is drawn into the notch 44 the thread is positively carried between the shuttle and detent across the lower face of the shuttle the length of the slot 40. The discoidal shuttle body 36 is cupshaped, having a circular open top recess 60 in which the bobbin 62 is rotatably mounted on a central post 64 u on which it is retained in place by a latch 66. The side wall 68 of the shuttle constitutes a substantially circular ring which is broken at one place where is cut in its to a notch 7 0 which extends nearly to the ottom of the bobbinreceiving recess. At one side of the notch 70 the inner face of the side wall 68 is recessed to receive an arcuate-shaped plate 72. The inner face of the plate 72 forms'a part of the side face of the circular bobbin-receiving recess. One end of the plate 72 extends partially across the notch 7 O and terminates in a downwardly extending finger 73. The plate 72 is secured to the shuttle body by screws 74 extending through the plate 72 and screw-threaded into the body portion of the shuttle. The side wall of the shuttle behind the plate 72 has a circumferential slot 76 in which is held a thread-tension leaf spring 78. One end of the spring 7 8 is bent sharply, and is received in an aperture 80 in the plate 72 so that spring 78 cannot move longitudinally in the slot 76. The other end of the spring 78 terminates in a downwardly extending finger 82 which bears against the outer face of the finger 73. The inner face of the finger 82 is hollowed somewhat to form a shallow thread retaining groove for the bobbin thread which it yieldingly presses comprising two relatively yielding, e

the shuttle and bears against the middle of the spring 7 8. When the shuttle is assembled, the spring 78 is placed against the plate 72 with its bent over end engaged in the aperture 80. The late 72 is then screwed to the side wall 0 the shuttle where it conceals and rotects the spring 78. The thread-tension evice of the shuttle can be easily and rapidly threaded. In threading the tension, the operator before he inserts the bobbin holds a short length of the bobbin thread taut, and brings this taut thread down into the notch 70. The thread is then drawn laterally under the lower end of the downwardly extending finger. thread is then pulled u behind the finger 78 73. The,

and is drawn upward y between the outer face .of the finger 73 and the inner face of the thread-tension finger 82, into the thread groove inthe finger 82. After the tension is thus threaded, the bobbin can be dropped into lace in the shuttle.

Vl ile the preferred embodiment of the" present invention has been specifically illustrated and described, it is to be understood that the present invention is not limited to the details of construction illustrated and described, but may be embodied in other structures within the scope of the invention as defined by the following claims 1. A shuttle having an open-topped bob-' bin-receiving recess with a notch in the top of its side wall, and having a thread-tension downwardly extending fingers at one si of the notch adapted to hold the bobbin thread between them. I

2. A. shuttle having, in combination, a body having a bobbin-receiving recess, a plate secured to the shuttle body and form ing a part of the face of the bobbin-receiving. recess, and a thread-tension sprin held between the plate and the shuttle b0 y.

3. A shuttle having, in combination, a cup-shaped discoidal body having a substantially circular bobbin-receiving recess with a notch in the top of its side wall, a

plate secured to the shuttle bod forming a part of the curved face of t e bobbinreceiving recess, and terminating in a downwardly extending finger in proximity to the notch, and a leaf-spring) held between the plate and the shuttle ody with its end )ea'rin a ainst the finger to yieldingly engage tie obbin thread and form a threadtension.

4. A shuttle having, in combination,,a cup-shaped discoidal bodyjhaving a'substantally circular bobbin-receiving recess with a notch in the to of its side wall, a late secured to the si e well within the b0 bin receiving recess and terminating in a. thread engaging finger in proximity to the notch, a leaf-spring held between the plate and the shuttle body with its end bearing against the finger to yieldingiy engage the bobbin thread and form a thrend-tensi0n, and a screw threaded through the side Wall of the shuttle and bearing against the spring for adjusting the tension of the spring. 

